Worked on the jd-opensource/OxyGent repository, focusing on backend development and test maintenance using Python. Addressed two targeted bugs to enhance the reliability of automated testing and the robustness of shell tooling. Corrected a test assertion typo to ensure accurate validation of Python tool outputs, directly improving test clarity and reducing false negatives in CI pipelines. Refined the run_shell_command utility by explicitly defining default parameter values, which improved predictability and stability when handling shell commands. Demonstrated strong debugging and testing skills, contributing to more stable CI runs, smoother contributor onboarding, and safer release cycles through careful attention to tooling behavior.